Improvement in window-sash ventilators



J. C. BATES.

Window-Sash Ventilators.

010 141254; Patentedjuly 29,1873.

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' AM PHOTO-LITHOGBAFHIC 012 Ml (aaeam's PROCESS) UNITED STATES PATENTQFFIOE.

JOHN G. BATES, OF GOLD SPRING, NEW YORK.

IMPROVEMENT IN WINDOW-SASH VENTILATORS.

Specification forming part of Letters Patent No. 141,254, dated July 29,1873; application filed May 10, 1873.

To all whom it may concern:

Be it known that I, J OHN O. BATES, of Cold Spring, in the county ofPutnam and State of New York, have invented a new and useful Improvementin Window-Sash Ventilator, of which the following is a specification:

Figure l is a horizontal section of a windowsash to which myimprovedventilator has been applied, taken through the line as m, Fig. 2. Fig. 2is a vertical section of the same taken through the line y 3 Fig. 1.

Similar letters of reference indicate corre- V spondin g parts.

My invention has for its object to furnish an improved device forventilating rooms, cars, 860., through the sashes of the windows, whichshall be simple in construction, convenient in vuse, and effective inoperation. The invention cut away adjacent to the plate B,so as to forman upward opening into the room, which openin g may be surrounded by acasing or box, 0, formed upon or attached to the plate B. When thesash-bar is thin, so that it cannot be cut away to form the upwardopening, the box 0 is made with a close bottom, and the said box andplate are attached to the inner side of the sash-bar. D is a metallicplate hinged at its upper edge to the sash-bar or to a light metallicframe attached to said sash-bar and surrounding the opening through it.The ends of the hinged plate D are flanged or bent inward, as shown inFig. 2, and the said plate is made of such a size as to shut and fitclosely into the opening through said sash-bar. To the middle part ofthe inner side of the hinged plate D is pivoted a long nut, E, intowhich screws a screw, F, swiveled to the plate B and having a knob orother handle formed upon its end for convenience in operating it. Ifdesired, the screw may be pivoted to the plate D and the nut swiveled tothe plate B. G is a fine wire gauze placed in the opening of theventilator to prevent the dust from entering the room, while allowingthe air to pass in freely.

In the case of .a window provided with inside blinds shutting closelyagainst the sash the swix eled screw or nut may be operated by a leveror cam movement, the handle of which projects up through the verticalopening or box of the ventilator, so as not to interfere .with saidblinds.

described.

J. O. BATES.

Witnesses I D. TRUESDELL,

lSAAO BATES.

